Improvement in sewing-machines



E. H. SMITILv Sewing Machine.

Patented Aug` 3, 1858.

NITED STATES E. HARRY SMITH, oF'Nnw YORK, N. Y.

`IIVIPRVENIENT IN SEVVINCU-hf'llCl-iINES.`

Specification forming part oi' Letters Patent No. QLSQ, (lated AugustIl, 1558] in elevation and the bed-plate in section, and Fig. 3 is thelooper in an edge view or plan.

l Similar marks of reference denote the same parts.

The nature of my said invention consists in a continuously-revolvinglooper that passes into, through, and out of the loop of needlethread,catching said loop and retaining the same in a distended form until theneedle in its next descent passes through the loop, and then the looperpasses out of said loop, allowing the same to be drawn up by the descentv of the needle, and another loop is taken by the point of the looperfrom the needle-thread as said looper revolves. In connection with thislooper I use a spreader that distends the loop for the needle to passinto the same, and I also drive my looper by a peculiar charac.

' ter`of revolving and oscillating lever.

It will be understood that the above is in no sense a revolvinglooper-hook, as that, for example, of A. F. Johnson, patented 1858, orthat of J. E. A. Gibbs, oi' June 2, 1857, as all such hooks, beingrigidly affixed to the end o f the driving-shaft, do not and cannot passthrough the loop, and therefore operate in a different manner from myinvention. It also differs from the rotary-shuttle sewing-machine ofBlodgett & Lerow in forming a chain instead of a shuttle stitch.

In the drawings, c is the bed of the machine, carrying the shaft b, onone end of which is a cam, c, acting on the heel of the needle-arm d, togive the same a vibrating motion.

c is the eye-pointed needle, carrying the thread from a spool `in anyconvenient manner. I would here remark that the needle might be actuatedby any desired means, so

long as the movements'were timed properly with the looper.

f is a plate formed in two halves and secured to the frame by suitablescrews. In this plate a circular opening is made with a V- formed edge,and my revolving looper g is inscrted within said opening, the samebeing provided with a V-l'ornied groove around its periphery, into whichthe edges of the plate f pass. This looper is driven by means of therevolving and4 oscillating lever h, the fulcrum of which is a pin, l,across the center of the shaft b, and the ends of the lever h areprovided with pins 2 and entering holes 4 and 5 in the looper g. v

6 is a spring acting on a heel-piece from the lever h, to keep the pin 2always in the hole 4, except when said pin is passing the loop ofneedle-thread, at which time the part 7 of the lever h, coming incontact with the under side of the bed c, (or its equivalent,) draws thepin 2 out of the hole 4, simultaneously forcing the pin 8 into the hole5, to keep up the continuous revolution of the looper g. The looper grevolves in the direction of the arrow 1, and is formed with the point 8to enter the loop of needle-thread, and the part 9 I is removed to allowthe descent of the needle. 10 is a wire or equivalent spreader, betweenwhich and the looper g the needle passes as it v descends.

The operation is as follows: The needle passes through the cloth,slightly rises, and forms a loop of needle-thread at the time the point8 of the looper reaches said loop, passing into the same, and the ringrevolves through said loop while the needle rises, and any suitableapparatus moves the cloth along in the direction of the arrow 2. Thelooper, by its revolution, draws the loop off diagonally, as shown bythe red lines, and the spreader l0 opens the loop, so that the needle inits next descent passes between thelooper g and spreader l0, directlythrough said loop with unerring certainty, and in the further revolutionof the looper, the rear end of said looper passing out of the loop,allowing the same to drawn up, and a new loop is taken from theneedle-thread by the pointS, as before.

1. Forming the stitch by means of the detached looper specified,operatingin combination with the needle, and vpassing entirely throughthe loop in substantially the manner and for the purposes described.

' 2. The spreader 10 on the side of lhe looper, for the purposesspecified.

3. The revolving and oscillating lever L,Wlien Constructed and arrangedin the manner described, to drive the looper g, substantially asspecified.

Dated this 22d day of January, 1858.

E. HARRY SMITH.

W'itnesses f LEMUEL W. SERRELL, THOMAS G. HAROLD.

